期刊
OPTICS LETTERS
卷 42, 期 9, 页码 1816-1819出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.42.001816
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资金
- Stanford/SLAC: U.S. Department of Energy (DOE)
- Office of Science (SC)
- Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division through the Early Career Research Program
- LSU: National Science Foundation (NSF) [PHY-1403236, PHY-1506345]
- UCF: National Science Foundation (NSF) [PHY-1403236, PHY-1506345]
- UCF: Air Force Office of Scientific Research (AFOSR) [FA9550-15-1-0037, FA9550-16-1-0149]
- Army Research Office (ARO) [W911NF-14-1-0383, W911NF15-1-0336]
- Defense Advanced Research Projects Agency (DARPA) PULSE Program [AMRDEC W31P4Q1310017]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1506345] Funding Source: National Science Foundation
Solid-state high-harmonic sources offer the possibility of compact, high-repetition-rate attosecond light emitters. However, the time structure of high harmonics must be characterized at the sub-cycle level. We use strong two-cycle laser pulses to directly control the time-dependent nonlinear current in single-crystal MgO, leading to the generation of extreme ultraviolet harmonics. We find that harmonics are delayed with respect to each other, yielding an atto-chirp, the value of which depends on the laser field strength. Our results provide the foundation for attosecond pulse metrology based on solid-state harmonics and a new approach to studying sub-cycle dynamics in solids. (C) 2017 Optical Society of America
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